Refrigerating apparatus



P 21, 5 A. M. SCHAFFER 2,689,622

REFRIGERATING APPARATUS Filed May 19, 1952 IN VHV TOR.

Amon M. Saraffer member 62 having the closed end of the cup connected to the sleeve 52. The open end of the cup surrounds an outlet member 64 in the end of the casing which is located coaxially with the drive shaft 24. Fastened to the inner face of this outlet member is a shielding disk 66 having an inner flanged opening. The rim of the cupshapedlme'mber 82 surrounds this shielding disk 66. It also is provided with an internal disk 68 which is placed parallel to the shielding disk 66 and extends substantially to the flange of the shielding disk 66 so as to prevent the flow of refrigerant around the rim of the cup-shaped member 62 into the outlet member 64. The two disks 66 and 68 therefore forma seal for the open side of the cup-shaped member 62.

To provide a means for normal flow of refrigerant vapor into the outlet 64, apertures are formed in the cylindrical portion thereof by striking out deflecting tongues in the trailing direction of rotation. These tongues 10 extend from the leading edge of the apertures over the apertures in the trailing direction. cup-shaped member 62 is connected by the sleeve 52 to the adjacent end of the drive shaft 24, it rotates at compressor speed which may be from 1200 to 3000 R. P. M. When this cup-shaped member 62 is rotated at a suflicient speed, the particles of lubricant in liquid form cannot enter the apertures because they are thrown outwardly by the deflecting tongues 10 because of centrifugal force. However, the necessary flow of refrigerant vapor from the interior of the casing 26 through the outlet fitting 64 to the condenser 12 provides a sufficient pressure difference to force the vapor through the apertures 14 which are formed by striking 'out of the deflecting tongues 10. The deflecting tongues 10 extend substantially tangentially to the cylindrical surface of the cup-shaped member 62.

Through this arrangement substantially all of the lubricant is retained within the compressor casing 26, and the refrigerant vapor flows to the condenser 12 practically'free of lubricant. The refrigerant flows from the condenser 72 to the evaporator 30 under the control of a suitable flow control device 16. Better evaporating conditions "in the evaporator are made possible by the sub stantially complete freedom of lubricant in the evaporator.

While I have chosen as an example of my invention the separation of particles of lubricant in liquid form from refrigerant vapor, it should be understood that the separation is not dependent upon these particular fluids but is applicable to all mixtures containing liquid particles in vapor.

Since the While the form of embodiment of the invention as herein disclosed constitutes a preferred form, it is to be understood that other forms might be adopted as may come within the scope of the claims which follow.

What is claimed is as follows:

1. A compressor including a casing having an inlet and an outlet for gaseousrefrigerant, a compressing means having its inlet connected to the inlet in said casing and having its outlet discharging into the interior of said casing, the interior of said casing forming a lubricant reservoir, a rotatable means connected to and rotated coincidentally to the operation of said compressing means, said rotatable means including a rotatable cup shaped portion having its rim extending around the outlet of said casing for shielding said outlet and preventing the direct flow of refrigerant into said outlet, the cylindrical part of said cup shaped portion having apertures therein through which the refrigerant flows to said outlet and deflectors extending in a trailing direction over said apertures to deflect lubricant from entering said apertures, and shielding means for substantially closing all entrances to the interior of said rotatable means except through said apertures.

2. A compressor including a casing having an inlet and an outlet for gaseous refrigerant, a compressin means having its inlet connected to the inlet in said casing and having its outlet discharging into the interior of said casing, the interior of said casing forming a lubricant reservoir, a rotatable means connected to and rotated coincidentally to the operation of said compressing means, said rotatable means including a rotatable cup shaped portion having its rim extending around the outlet of said casing for shielding said outlet and preventing the direct flow of refrigerant into said outlet, the cylindri-' cal part of said cup shaped portion having apertures therein through which the refrigerant flows to said outlet and deflectors from each leading edge in a trailing direction over each of said apertures to deflect lubricant from entering said apertures, and shielding means for substantially closing all entrances to the interior of said rotatable means except through said'apertures.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 419,316 Case Jan. 14, 1890 468,964 Cockrell Feb. 16, 1892 1,057,613 Baldwin Apr. 1, 1913 2,143,144 Fagerberg Jan. 10, 1939 2,228,364 Phillip Jan. 14, 1941 

